EP 0911979 A3 20020717 - Audio signal processor
Title (en)
Audio signal processor
Title (de)
Audiosignalprozessor
Title (fr)
Processeur de signaux audio
Publication
Application
Priority
GB 9722533 A 19971024
Abstract (en)
[origin: EP0911979A2] An audio signal processor for processing 1-bit signals, comprises an input (40) for receiving a 1-bit signal, means (41,42) for applying a predetermined filter characteristic to the 1-bit signal whereby the signal is also converted to an n-bit signal where n is greater than one, means (43) for determining the absolute value of the n-bit signal, means (46,51) for producing a dynamics control signal dependent on the said absolute value, means (48) for applying the dynamics control signal to the 1-bit input signal, and means (49) for requantizing the dynamics controlled signal as a 1-bit signal and shaping the noise in the requantised 1-bit signal. Circuits for producing LOG base 2 and the corresponding anti-log are also disclosed. <IMAGE>
IPC 1-7
IPC 8 full level
G06F 7/556 (2006.01); G10L 19/00 (2013.01); G10L 21/02 (2006.01); G10L 21/0208 (2013.01); H03H 17/02 (2006.01); H03M 3/02 (2006.01); H03M 7/00 (2006.01); H03M 7/50 (2006.01)
CPC (source: EP KR US)
G06F 7/556 (2013.01 - EP US); H03M 7/3013 (2013.01 - EP US); H04L 27/34 (2013.01 - KR)
Citation (search report)
[A] EP 0783207 A2 19970709 - SONY CORP [JP]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0911979 A2 19990428; EP 0911979 A3 20020717; EP 0911979 B1 20100825; CN 1233025 A 19991027; DE 69841855 D1 20101007; GB 2330749 A 19990428; GB 2330749 B 20020821; GB 9722533 D0 19971224; JP 4058176 B2 20080305; JP H11239061 A 19990831; KR 19990037311 A 19990525; US 6295014 B1 20010925; US 6377193 B1 20020423
DOCDB simple family (application)
EP 98308005 A 19981001; CN 98124167 A 19981024; DE 69841855 T 19981001; GB 9722533 A 19971024; JP 29229198 A 19981014; KR 19980044464 A 19981023; US 17794598 A 19981023; US 51403800 A 20000225